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JSON Formatter & Validator Online Free
Format, validate and beautify JSON instantly in your browser.
What is a JSON Formatter?
A JSON formatter (also called a JSON beautifier) takes minified or poorly formatted JSON and outputs it with proper indentation and line breaks — making it instantly readable. It also validates the JSON and highlights syntax errors.
How to Format JSON Online
Paste your JSON into the input box and click Format / Beautify to see the indented result. Click Minify to compact it back to a single line for production use. Click Copy to copy the output to your clipboard.
Why Use This Free JSON Formatter?
Whether you're debugging API responses, reading config files, or preparing data for a code review, formatted JSON is always easier to work with. Our tool runs entirely in your browser — no data is sent to any server.
Frequently Asked Questions
Can it validate JSON? expand_more
Can I minify JSON too? expand_more
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